GHSA-GWM9-34WJ-G7PC

Vulnerability from github – Published: 2026-05-08 15:31 – Updated: 2026-05-26 18:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

nouveau/dpcd: return EBUSY for aux xfer if the device is asleep

If we have runtime suspended, and userspace wants to use /dev/drm_dp_* then just tell it the device is busy instead of crashing in the GSP code.

WARNING: CPU: 2 PID: 565741 at drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c:164 r535_gsp_msgq_wait+0x9a/0xb0 [nouveau] CPU: 2 UID: 0 PID: 565741 Comm: fwupd Not tainted 6.18.10-200.fc43.x86_64 #1 PREEMPT(lazy) Hardware name: LENOVO 20QTS0PQ00/20QTS0PQ00, BIOS N2OET65W (1.52 ) 08/05/2024 RIP: 0010:r535_gsp_msgq_wait+0x9a/0xb0 [nouveau]

This is a simple fix to get backported. We should probably engineer a proper power domain solution to wake up devices and keep them awake while fw updates are happening.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-43381"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-08T15:16:49Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnouveau/dpcd: return EBUSY for aux xfer if the device is asleep\n\nIf we have runtime suspended, and userspace wants to use /dev/drm_dp_*\nthen just tell it the device is busy instead of crashing in the GSP\ncode.\n\nWARNING: CPU: 2 PID: 565741 at drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c:164 r535_gsp_msgq_wait+0x9a/0xb0 [nouveau]\nCPU: 2 UID: 0 PID: 565741 Comm: fwupd Not tainted 6.18.10-200.fc43.x86_64 #1 PREEMPT(lazy)\nHardware name: LENOVO 20QTS0PQ00/20QTS0PQ00, BIOS N2OET65W (1.52 ) 08/05/2024\nRIP: 0010:r535_gsp_msgq_wait+0x9a/0xb0 [nouveau]\n\nThis is a simple fix to get backported. We should probably engineer a\nproper power domain solution to wake up devices and keep them awake\nwhile fw updates are happening.",
  "id": "GHSA-gwm9-34wj-g7pc",
  "modified": "2026-05-26T18:31:37Z",
  "published": "2026-05-08T15:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43381"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/178df7c91e6c202579284df9f79d1592a514cdcf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24639553a016578222ac597db924dfb6fa5ec8b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4df518aa196085909fd7e32518ecd27fba60ed69"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6bdd2d70c338d52c387d3b3aadc596784ae81b01"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f3c6f08ababad2e3bdd239728cf66a9949446b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad8fa5bff53f5d1f8394f996850da8ce070eaee3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd24cab2023aa46b595bc6b9cc39d8973d9d0a8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fad178ae894930520519ead3c8e0150641466360"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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